Solution of the exercises list:

Dial Indicator - Reading and interpretation exercises - Metrology

The dial indicators printed in the exercises page has the span (range) of 10mm and resolution of 0.01mm (0.01 - 10.00mm) or *span * of one inch (1") and resolution of 0.001in (1 - 0.001in).

reading | observation | |||
---|---|---|---|---|

lap counter | main dial | interpretation | ||

x 1mm | x 0.01mm | lap counter + main dial | ||

1. | <1 | 42 | 0.42mm | the pointer of the main dial has not complete full turn and swept 42 marks. 0 x 1mm + 42 x 0.01 mm = 0.42 mm |

2. | 5 | 4(5) | 5.04mm | the pointer of the main dial completed five turns, and swept 4 marks stopping between the 4th and 5th mark. The number was not rounded, because 4 is an even number. Another possible interpretation is 5.045 mm |

3. | 2 | 29 | 2.29mm | |

4. | 9 | 85(5) | 9.86mm | the pointer of the main dial completed nine turns, and swept 85 marks stopping between the 85th and 86th mark. The number was rounded up, because five is an odd number. Another possible interpretation is 9.855mm |

5. | 9 | 3 | 9.03mm | |

6. | 3 | 6 | 3.06mm | |

7. | 1 | 52 | 1.52mm | |

8. | 4 | 97(5) | 4.98mm | apparently the lap counter counted five millimeters. It's missing 0.02mm for the main dial to take five turns. Another possible interpretation is 4.975 mm |

9. | 2 | 63 | 2.63mm | |

10. | 9 | 86(5) | 9.86mm | Other possible interpretation is 9.865mm |

11. | 8 | 98(5) | 8.98mm | Other possible interpretation is 8,985mm |

12. | 1 | 28 | 1.28mm | the fact that the pointer of the main dial stop at an intermediate position (between two marks) was compensated for the fact that it started from an intermediate position |

13. | <1 | 52(5) | 0.52mm | Other possible interpretation is 0,525mm |

14. | 5 | 2(5) | 5.02mm | Other possible interpretation is 5,025mm |

15. | 7 | 60(5) | 7.61mm | Other possible interpretation is 7,605mm |

16. | 9 | 85(5) | 9,86mm | Other possible interpretation is 9,855mm |

17. | 8 | 98(5) | 8.98mm | same condition as ex. 11°. check if you interpretate the same value at both results |

18. | 1 | 31 | 1.31mm | |

obs. | the signal '<1' means that this pointer did not sweep a sector> = 36° (less than one full turn of the pointer of the main dial) | '(5)' means that the pointer is between two marks (0.005 mm) | the values were rounded by the rule - even keep it - odd add one |

reading | obsercation | |||
---|---|---|---|---|

lap counter | main dial | interpretation | ||

x 0.1in | x 0.001in | lap counter + main dial | ||

1. | <1 | 42 | 0.042in | the pointer of the main dial has not complete full turn and swept 42 marks. 0 x 0.1in + 42 x 0.001in = 0.042in |

2. | 5 | 4(5) | 0.504in | the pointer of the main dial completed five turns, and swept 4 marks stopping between the 4th and 5th mark. The number was not rounded, because 4 is an even number. Another possible interpretation is 0.5045in |

3. | 2 | 29 | 0.229in | |

4. | 9 | 85(5) | 0.986in | the pointer of the main dial completed nine turns, and swept 85 marks stopping between the 85th and 86th mark. The number was rounded up, because five is an odd number. Another possible interpretation is 0.9855in |

5. | 9 | 3 | 0.903in | |

6. | 3 | 6 | 0.306in | |

7. | 1 | 52 | 0.152in | |

8. | 4 | 97(5) | 0.498in | apparently the lap counter counted five millimeters. It's missing 0.002in for the main dial to take five turns. Another possible interpretation is 0.4975 in |

9. | 2 | 63 | 0.263in | |

10. | 9 | 86(5) | 0.986in | Other possible interpretation is 0.9865in |

11. | 8 | 98(5) | 0.898in | Other possible interpretation is 0.8985in |

12. | 1 | 28 | 0.128in | (between two marks) was compensated for the fact that it started from an intermediate position |

13. | <1 | 52(5) | 0.052in | Other possible interpretation is 0.0525in |

14. | 5 | 2(5) | 0.502in | Other possible interpretation is 0.5025in |

15. | 7 | 60(5) | 0.761in | Other possible interpretation is 0.7605in |

16. | 9 | 85(5) | 0.986in | Other possible interpretation is 0.9855in |

17. | 8 | 98(5) | 0.898in | same condition as ex. 11°. check if you interpretate the same value at both results |

18. | 1 | 31 | 0.131in | |

obs. | the signal '<1' means that this pointer did not sweep a sector> = 36° (less than one full turn of the pointer of the main dial) | '(5)' means that the pointer is between two marks (0.0005 in) |